The causes of acid liquefaction in a high grade pasteurized milk were investigated. 1. Liquefying milk produced much less acid and had a much lower plate count than normal milk. 2. <i>Bacillus albolactis</i> was found regularly in the milk. It made up a much larger percentage of the total flora in liquefying than in normal milk. 3. Associated growth experiments showed that <i>Strep. lactis</i> could control the liquefying activities of <i>Bacillus albolactis</i>. 4. Pasteurization experiments showed that milk heated for 20 minutes at temperatures higher than 61°C. would undergo acid liquefaction. This appeared to be due to the increase in the percentage of <i>Bacillus albolactis</i>. 5. Inoculation of pasteurized samples with <i>Strep. lactis</i> prevented acid liquefaction. 6. Comparison with a type species showed that the strains of <i>Strep. lactis</i> repeatedly isolated from the milk studied were of the <i>tardus</i> variety. 7. The liquefaction was probably primarily due to an increased percentage of <i>Bacillus albolactis</i> brought about by pasteurization; the lack of the type of species of <i>Strep. lactis</i> and the absence of lactobacilli might also have been contributing factors. / Master of Science

The object of this investigation was to ripen and dry soybeans in such a way as to prevent the formation of bad taste and odor in the oil. Field run soybeans were treated in specially constructed gas-tight silos through which mixtures of air, carbon dioxide, and ethylene in varying concentrations were recirculated for the purpose of maturing and stabilizing the beans and to prevent peroxidases action, the latter being credited with imparting the offensive odor and taste to the oil and meal obtained by processing the bean. Nine silos were run simultaneously with nine different mixes of gases varying between 90 to 35% ethylene and 10 to 65% carbon dioxide and air. Whole beans were treated for 24 and 48 hours at 24, 37, and 50°C., rolled flat in a roll mill and expressed at 45-60°C. in a Carver hydraulic press at 10,000 lb. per sq. inch. From each sample of beans pressed was taken two samples of oil. One sample was left exposed to the air while the other one was sealed by means of a cap. From the taste and odor tests it was found that whole beans treated with ethylene at 24°C. Gave the best oil, being only slightly better than the oil from the whole beans treated at 37°C. Soybeans, when treated with ethylene and carbon dioxide, absorb varying amounts of the gases, depending on the gas concentration and the water removed. The drying rate of the soybeans by air was considerably less than the drying rate when ethylene and carbon dioxide were used. / Master of Science

Gas absorption may be defined as the transfer from a gas to a liquid of one or more components of a gaseous mixture by means of solution in a liquid. This is accomplished by bringing the two phases together, with a large amount of interfacial surface, in an economical manner for commercial use. Much is lacking in knowledge of the theory of gas absorption. This lack of knowledge and the wide variety of purposes and specifications have caused many types of absorption equipment to be designed, built and used. The objective in all causes has been to increase the surface of contact between the gas and the liquid at low installation cost and with low operating costs. The most common type of absorption equipment is the packed tower. It consists, essentially, of a vertical shell filled with an inert packing material. Absorption is accomplished by countercurrent operation, the solvent being allowed to trickle down over the packing material while the gas passes up through the wetted packing. The tower packing is the fundamental consideration in improving the efficiency of the equipment. A packing material should have a low resistance to gas flow so as to give low maintenance costs, a high absorption capacity and low costs of installation. In any case, the packing that most completely fills the requirements should be used. It is the purpose of this investigation to make a study of the characteristics of operation of copper knit-metal cloth, in comparison to Raschig rings, when used absorption tower packings. / Master of Science

In a large part of the soil fertility studies that have been attempted in the past, a great number of the results obtained were based almost entirely on crop yields. These yields were used as the final criterion upon which to draw conclusions as to whether a given system of soil management was a profitable one. At the Virginia Agricultural Experiment Station, Blacksburg, Virginia, a series of rotation and continuous cropping experiments have been undergoing a specified treatment for a period of 24 years. Conclusions as to the expediency of the practices followed have been approached from a purely crop yield basis. This method is serving its purpose in showing exactly how much the land is producing at the present time under a given soil management practice. It is believed, however, that a soil management program goes further than this. A practice based on crop production alone may prove, over a long period of time, to be a poor one. Perhaps just as important are the conditions arising within the soil relating to these practices. Whether or not the system evolved is one of soil building rather than one of soil depletion, is a question which necessarily must be considered before any recommendation as to the soil management practices to be followed, may be attempted. / Master of Science

Master of Science

The object of this paper is a study of the geology and the commercial occurrence of gold on the Scotia Gold Property, number two. This study is based in part on field observations which the writer made during the summer 1937 under the auspices of the Canadian Geological Survey, and in part on laboratory investigations which are based on the study of both, the thin sections of rock and the polished opaque sections of the ore. The property or the company described in this report is situated in southeastern Manitoba, in the Rice Lake Mining Area, approximately 150 miles northeast of the city of Winnipeg and within ten miles of the Ontario-Manitoba boundary and in the Long-Lake-Beresford-Lake section. The group of claims comprising this gold prospect is located in Township 22, Range 16. East of the Principal Meridian, as shown in the index map (figure 1). The surrounding formations and including those found on the property are known as the gold-bearing quartz veins of the Beresford-Rice lakes area lying in the basins of the Manigotogan and Wanipigow rivers. This complex belt or sediments and volcanics is Pre-Cambrian in age and varies in width from two to ten miles and about fifty miles long. The rock formations immediately surrounding this greenstone belt are deep seated granite intrusives and in some places, have penetrated the basic complex and are now exposed as large granite bodies. / Master of Science

Based on the results of this investigation certain conclusions were arrived at relative to Portland cement concrete using Dolomitic limestone sand as the fine aggregate. The most important of these are as follows: 1. Fresh concrete continues to gain strength while in the frozen state. 2. Freezing and then thawing of fresh concrete does not have an appreciable effect on the twenty-eight day ultimate strength, and the concrete, if given time to recover, will compare favorably with concrete cured under normal conditions. 3. Freezing of concrete immediately after pouring has a greater effect on the twenty-eight day ultimate strength of the concrete than has freezing for the same period at a more advanced age within the twenty-eight days. 4. Concrete cured at 65°C. tends to increase its twenty-eight day ultimate strength, providing the water lost through evaporation is replaced. 5. High early strength concrete can be obtained by curing ordinary Portland cement concrete at high temperatures. Based on the results of compression tests performed in this investigation, Dolomitic limestone sand has been found to be satisfactory as the fine aggregate for Portland cement concrete; verifying what Messrs. Broyles and Brown had said in 1936 and 1937 respectively. What has been done in the way of concrete research at Virginia Polytechnic Institute is satisfactory for relatively new concrete using Dolomitic limestone sand as the fine aggregate; but it is wondered how this concrete will stand up over a long period of time. Professor Hartman and Dr. Holden have inaugurated some long time studies at the Institution, but there is still much room for further investigation. Dolomitic limestone rock has proven itself worthy when used as the coarse aggregate for Portland cement concrete. It is up to time and future research to prove the worth of its sand used as the fine aggregate. / Master of Science

No description available.

The submitted doctoral thesis focuses on the development and transformation of the Czechoslovak pencil industry in the period after the onset of the planned economy. The major pencil manufacturer Koh-I-Noor Hardtmuth was at the heart of the analysis. The annual reports, annual financial statements, business trip reports, and minutes of the director's and production meetings formed the source base. The correspondence with individual domestic institutions or foreign business partners, memories and a company magazine were also used. The preserved image archival documents - promotional leaflets and price lists - were not left out. The work is based on the methodological basis of the business history. The organization, operation and management strategies of the pencil industry in the historical background of economic changes and reforms have become the subject to examination. The national enterprises Centropen, Gama and Logarex, which were engaged in the production of office supplies, were also included into the research in terms of the comparison. The emphasis was placed on the role of individual managers conducting entrusted enterprises next to the analysis of turnover, production level and a number of employees. Advertising and promotional activities and their importance in the socialist economy was not left behind. In this context, the impact of extensive litigation regarding the trade mark and the name of Hardtmuth, which affected the export, production and advertising sectors, have not been overlooked. The interrelationship between the manufacturing enterprise and export organizations became one of the key topics.

Ce mémoire se propose d'analyser les oeuvres des actionnistes viennois Günter Brus, Otto Mühl et Hermann Nitsch selon les aspects du rituel et de la violence. Cette recherche constitue la première étude sérieuse se penchant sur ces deux caractéristiques importantes de la pratique de ces artistes. À travers ce mémoire, nous abordons les concepts de la limite et de la transgression, du tabou, du rituel et de la violence afin d'en souligner leur manifestation à l'intérieur de leurs oeuvres ou dans leur pratique esthétique individuelle. Par l'entremise des thématiques du rituel et de la violence, nous élaborons l'hypothèse, que les actionnistes, à travers leurs actions, représentent l'ouverture du corps. Pour ce faire, nous avons basé notre travail de recherche selon les trois axes méthodologiques suivants: historiques, iconographiques et sémantiques. Nous avons découvert, ce faisant, que l'aspect du rituel et de la violence sont, dans un premier temps, liés intrinsèquement l'un à l'autre par le traitement du corps dans leur pratique respective, ensuite que leur mise en scène employant des éléments du rituel des sociétés dites «primitives» avait pour but l'exacerbation violente d'une situation prenant racine dans la société. Enfin, c'est par l'ajout, dans leur représentation du corps, des éléments empruntés aux divers rites, que la violence se manifeste dans leurs oeuvres à travers l'ouverture symbolique du corps. ______________________________________________________________________________ MOTS-CLÉS DE L’AUTEUR : Actionniste, Rituel, Violence, Transgression, Tabou.